October 2002

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Features

The Sciences

Controlling Robots with the Mind

People with nerve or limb injuries may one day be able
to command wheelchairs, prosthetics and even paralyzed arms
and legs by "thinking them through" the motions

By Miguel A. L. Nicolelis and John K. Chapin

Skin Deep

Throughout the world, human skin color has evolved to be
dark enough to prevent sunlight from destroying the nutrient
folate but light enough to foster the production of vitamin D

By Nina G. Jablonski and George Chaplin

The Sciences

Lightning Rods for Nanoelectronics: Basic Effects of High Voltages in Semiconductors

By Steven H. Voldman

Technology against Terror

Biologists and engineers are devising early-warning systems that can detect a bioterrorist attack in time to blunt its effects

By Rocco Casagrande

Vehicle of Change

It's not just about transportation: the transition to fuel-cell cars could transform energy infrastructures and developing economies while helping the environment

Computers for the Third World

Vying for Eyes

Fuzzy Logic

Ask the Experts: October 2002

Purchase To Read More

Digital Issue ?Read or download this issue’s articles online. *A printed copy of this issue is not included. $7.99

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